fuel computer ?
03-02-2011, 08:45 PM
#2
Dont know about the wiring but they are very accurate.
They calculate your MPG and mileage by measuring your speed and fuel flow, so fuel used/miles travelled=MPG and then the amount of fuel in your tank/MPG=Mileage left before empty.
Annoyingly since converting to EFI I cannot use mine as the fuel flow sensor went inline with one of the MFI injectors and as they all now run from a fuel rail I cannot plumb it in anywhere
They calculate your MPG and mileage by measuring your speed and fuel flow, so fuel used/miles travelled=MPG and then the amount of fuel in your tank/MPG=Mileage left before empty.
Annoyingly since converting to EFI I cannot use mine as the fuel flow sensor went inline with one of the MFI injectors and as they all now run from a fuel rail I cannot plumb it in anywhere
Last edited by Karlos G; 03-02-2011 at 08:47 PM.
lol
03-02-2011, 08:59 PM
#6
Wye Valley Hardcore
I always thought they were about as accurate as me sat in the passenger seat shouting numbers at the driver? If they are accurate would be a good feature to try and get working with an EFI conversion.
03-02-2011, 09:03 PM
#7
Yeah it's a basic formula so cant really be wrong 
lol
Just the same as you filling up your tank with say 47L of fuel then driving 200 miles and running out, pulling out your calculator to see that you've averaged 19.1 mpg.
The computer of course does this live constantly monitoring your fuel flow and speed so can give you an instant figure as well as an average and predicted mileage left.
Would love to get mine working again!
Need a little convertor to convert injector PW to the correct signal the computer wants to see and of course be calibrated to match.
lolJust the same as you filling up your tank with say 47L of fuel then driving 200 miles and running out, pulling out your calculator to see that you've averaged 19.1 mpg.
The computer of course does this live constantly monitoring your fuel flow and speed so can give you an instant figure as well as an average and predicted mileage left.
Would love to get mine working again!
Need a little convertor to convert injector PW to the correct signal the computer wants to see and of course be calibrated to match.
Last edited by Karlos G; 03-02-2011 at 09:06 PM.
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03-02-2011, 09:12 PM
#10
OCD Victim
Karlos, you can use the fuel computer on the EFI version, you just do not connect one of the earths and wire strraight to the ECU outputs.
Pins:
1 = red = Perm +12V
2 = grey/green = Lights +12V
3 = brown/red = Fuel remaining on sender
4 = not used
5 = brown = Earth
6 = brown/white = Speed sensor
7 = brown/green = Fuel flow (pin 17 on ecu)
8 = not used
9 = black/yellow = Ign +12V
If you leave the other earth connected, you will not get over 11mpg max as the calculations will be incorrect.
Pins:
1 = red = Perm +12V
2 = grey/green = Lights +12V
3 = brown/red = Fuel remaining on sender
4 = not used
5 = brown = Earth
6 = brown/white = Speed sensor
7 = brown/green = Fuel flow (pin 17 on ecu)
8 = not used
9 = black/yellow = Ign +12V
If you leave the other earth connected, you will not get over 11mpg max as the calculations will be incorrect.
03-02-2011, 09:14 PM
#11
OCD Victim
Martin, I have a spare one sitting @ the top of my stairs if you want one?
IF I can find a plug for it (same as Sierra and early MK3 Granada models) then I'd be happy to wire it in for you.
IF I can find a plug for it (same as Sierra and early MK3 Granada models) then I'd be happy to wire it in for you.
03-02-2011, 09:27 PM
#13
OCD Victim
You would need to either measure it or speak to someone like Stu or someone who can programme EEC-IV
03-02-2011, 09:53 PM
#15
Might pin 17 be an injector output? in which case you could probably use it?
EDIT, the fuel computer would probably be making assumptions about flow at stock fuel rail pressure with stock injector size.... so would be wrong.
Still possible, though. If the original mfi unit was in line with an injector it must be looking at 1/4 fuel used and multiply the out put? Assuming its voltage rises with fuel speed (think they have a little impeller type jobby in there) you could possibly put the sender inline with your fuel rail (etc) and use a variable resistor set up to calibrate its out put.
Assuming thats how they work.
Rob,
EDIT, the fuel computer would probably be making assumptions about flow at stock fuel rail pressure with stock injector size.... so would be wrong.
Still possible, though. If the original mfi unit was in line with an injector it must be looking at 1/4 fuel used and multiply the out put? Assuming its voltage rises with fuel speed (think they have a little impeller type jobby in there) you could possibly put the sender inline with your fuel rail (etc) and use a variable resistor set up to calibrate its out put.
Assuming thats how they work.
Rob,
03-02-2011, 10:05 PM
#16
Think you could be right about it being a pulsed out put from the flow sender,
http://www.race-technology.com/conte...pcat=2&cat=728
I guess most senders will work using the same theory. Still not an impossible thing to do though mate. Ie, using a simple calibration circuit to alter the output of a sender so your fuel computer can make sense of it.
Assuming, the mfi sender is looking at 1/4 fuel used, (one injector), placing the sender on the fuel rail input would mean it was looking at 100% fuel used. So a simple circuit would divide the pulse out put by 4. Not sure how clean the out put from one of these is but if your fuel computer can interpret the results it can't be too bad. I think the pulse width will stay the same.....
http://www.race-technology.com/conte...pcat=2&cat=728
I guess most senders will work using the same theory. Still not an impossible thing to do though mate. Ie, using a simple calibration circuit to alter the output of a sender so your fuel computer can make sense of it.
Assuming, the mfi sender is looking at 1/4 fuel used, (one injector), placing the sender on the fuel rail input would mean it was looking at 100% fuel used. So a simple circuit would divide the pulse out put by 4. Not sure how clean the out put from one of these is but if your fuel computer can interpret the results it can't be too bad. I think the pulse width will stay the same.....
Last edited by Rob_DOHC; 03-02-2011 at 10:14 PM.
04-02-2011, 09:24 AM
#17
I agree Rob, for it to work using an injector PW the converter would have to be programmable with injector size, fuel pressure and be calibrated to output the correct signal so thats getting a bit complex.
If it can go inline with the fuel feed to the rail and be divided by four then that is far simpler.
Assuming the flow sensor can flow enough to not be a restriction at high load (same or bigger diameter as the fuel line) another problem is that on MFI it measures flow reaching one injector where as if we put it inline with the fuel rail feed it will measure total flow including whats being returned to the tank so will be over reading.
If it can go inline with the fuel feed to the rail and be divided by four then that is far simpler.
Assuming the flow sensor can flow enough to not be a restriction at high load (same or bigger diameter as the fuel line) another problem is that on MFI it measures flow reaching one injector where as if we put it inline with the fuel rail feed it will measure total flow including whats being returned to the tank so will be over reading.
Last edited by Karlos G; 04-02-2011 at 09:27 AM.
04-02-2011, 10:04 AM
#18
Well my EFi Orion had one as standard in it and when i recently changed to OFAC Turbo ECU the computer reads but not accurately, ive worked it out to be 1/2 reading. So it thinks im doing 17mpg when in fact ive got nearer to 34mpg... Could this be a difference in the wiring as Fiesta RSTs did not have a fuel comp..?
07-02-2011, 07:10 PM
#19
Advanced PassionFord User
Thread Starter
Well my EFi Orion had one as standard in it and when i recently changed to OFAC Turbo ECU the computer reads but not accurately, ive worked it out to be 1/2 reading. So it thinks im doing 17mpg when in fact ive got nearer to 34mpg... Could this be a difference in the wiring as Fiesta RSTs did not have a fuel comp..?
you sure you just not doing 17mpg its an rs after all
07-02-2011, 08:22 PM
#20
I agree Rob, for it to work using an injector PW the converter would have to be programmable with injector size, fuel pressure and be calibrated to output the correct signal so thats getting a bit complex.
If it can go inline with the fuel feed to the rail and be divided by four then that is far simpler.
Assuming the flow sensor can flow enough to not be a restriction at high load (same or bigger diameter as the fuel line) another problem is that on MFI it measures flow reaching one injector where as if we put it inline with the fuel rail feed it will measure total flow including whats being returned to the tank so will be over reading.
If it can go inline with the fuel feed to the rail and be divided by four then that is far simpler.
Assuming the flow sensor can flow enough to not be a restriction at high load (same or bigger diameter as the fuel line) another problem is that on MFI it measures flow reaching one injector where as if we put it inline with the fuel rail feed it will measure total flow including whats being returned to the tank so will be over reading.
ahhh, true, i forgot about the fuel return!
08-02-2011, 10:47 AM
#21
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i had them in 2 orions i had..1 efi and the other mfi..neiter of them were acurate..i once ran out of petrol with over 100 mile range left yet sometimes it would read 1 mile left after filling up..just fixed my tank sender and ignored the computer after i conked out ha..
08-02-2011, 11:35 AM
#23
Advanced PassionFord User
i had them in 2 orions i had..1 efi and the other mfi..neiter of them were acurate..i once ran out of petrol with over 100 mile range left yet sometimes it would read 1 mile left after filling up..just fixed my tank sender and ignored the computer after i conked out ha..
08-02-2011, 12:13 PM
#24
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i just fitted a new sender..thing is if you fix the faults causing the computer to read wrong how long does it last before it needs redoing..i had the car when it was 11 year old and my uncle before that had it from 3 yo, and he said it never worked properly in all the time he had it..so im thinking using brand new parts ford only managed to make it last 3 year?? i know it could be a one off dodgy one though. the beeping is annoying aswell if it constantly reads low fuel
08-02-2011, 01:34 PM
#25
i just fitted a new sender..thing is if you fix the faults causing the computer to read wrong how long does it last before it needs redoing..i had the car when it was 11 year old and my uncle before that had it from 3 yo, and he said it never worked properly in all the time he had it..so im thinking using brand new parts ford only managed to make it last 3 year?? i know it could be a one off dodgy one though. the beeping is annoying aswell if it constantly reads low fuel
08-02-2011, 06:50 PM
#26
Advanced PassionFord User
i just fitted a new sender..thing is if you fix the faults causing the computer to read wrong how long does it last before it needs redoing..i had the car when it was 11 year old and my uncle before that had it from 3 yo, and he said it never worked properly in all the time he had it..so im thinking using brand new parts ford only managed to make it last 3 year?? i know it could be a one off dodgy one though. the beeping is annoying aswell if it constantly reads low fuel
09-02-2011, 07:07 AM
#27
B19JUB, il have an ask about for you on the Orion Register m8, bound to be a spare fuel sensor on there... U mean flow sensor or in tank level sensor?
My fuel comp worked fine up until i put an OFAC ecu in the car...
Any1 know how to modify it to work with OFAC?
My fuel comp worked fine up until i put an OFAC ecu in the car...
Any1 know how to modify it to work with OFAC?
09-02-2011, 07:09 AM
#28
Advanced PassionFord User
15-02-2012, 08:15 PM
#33
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Hi !
I'm a new man in Rs turbo club...
I have old European mk4 Cabby, now I'v got Cabby RS Turbo MFI..
can I put in Fuel comp ???
pleeese , can You tell me about it ... I try to find anything about it ..
best regards
Alex
I'm a new man in Rs turbo club...
I have old European mk4 Cabby, now I'v got Cabby RS Turbo MFI..
can I put in Fuel comp ???
pleeese , can You tell me about it ... I try to find anything about it ..
best regards
Alex
01-04-2013, 03:09 AM
#34
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trip computer
hello my friend okay? I need a fuel flow sensor for my escort carbureted could help me find one? I'm from Brazil and I'm dying to get my computer to run fuel, thanks
01-04-2013, 10:36 AM
#35
Regular Contributor
got a full tank set up there,tank sender pump etc(of a mk4 mfi xr3i reckon it would be same )... fuel comp has its own loom well does on mfi...have a full fuel comp set up for mfi also...
Last edited by boeb; 01-04-2013 at 10:55 AM.
01-04-2013, 03:52 PM
#36
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fuel trip computer
13-05-2020, 04:15 PM
#37
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[CITAÇÃO = Karlos G; 5324852] Não sei sobre a fiação, mas eles são muito precisos.
Eles calculam seu MPG e quilometragem medindo sua velocidade e fluxo de combustível; portanto, combustível usado / milhas percorridas = MPG e, em seguida, a quantidade de combustível em seu tanque / MPG = Quilometragem deixada antes do vazio.
Irritantemente, desde a conversão para EFI, não posso usar o meu, pois o sensor de fluxo de combustível foi alinhado com um dos injetores da MFI e, como agora todos correm de um trilho de combustível, não consigo instalá-lo em nenhum lugar[/ CITAÇÕES]good afternoon everyone
a liquid crystal display on my companion's on-board computer has been damaged and I need another on-board computer.
it may even be burnt as long as the screen is fine.
why would anyone want to sell me?
thank you.
Eles calculam seu MPG e quilometragem medindo sua velocidade e fluxo de combustível; portanto, combustível usado / milhas percorridas = MPG e, em seguida, a quantidade de combustível em seu tanque / MPG = Quilometragem deixada antes do vazio.
Irritantemente, desde a conversão para EFI, não posso usar o meu, pois o sensor de fluxo de combustível foi alinhado com um dos injetores da MFI e, como agora todos correm de um trilho de combustível, não consigo instalá-lo em nenhum lugar
[/ CITAÇÕES]good afternoon everyonea liquid crystal display on my companion's on-board computer has been damaged and I need another on-board computer.
it may even be burnt as long as the screen is fine.
why would anyone want to sell me?
thank you.
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